I just read the Gamespot review and the journo said "One of this mini-expansion's greatest joys is its new areas. You investigate a portion of the oblivion realm, which has an otherworldly beauty, and travel through a chilly glacial retreat replete with gorgeous waterfalls and frozen lakes. You traverse suspended walkways and fight pointy-eared falmer upon them, and get swept away by rushing waters too strong to struggle against. Dawnguard is lovely and atmospheric, and traveling these new regions is a pleasure."
What new regions? New glacial retreats? Where?